The aspect ratio changes twice in the theatrical release.
If you had the chance to see Galaxy Quest in theaters you may have noticed multiple changes in aspect ratios throughout the film. The movie begins with a clip from the fictional Galaxy Quest TV show at an aspect ratio of 1.33:1 then quickly expands to 1.85:1. Later in the film, when Tim Allen’s character witnesses the bay doors open and realizes he’s on a real space ship, the aspect ratio expands once again from 1.85:1 to 2.35:1.
In the VHS version the aspect ratio changes from 1.33:1 straight to 2.35:1 in the opening scene.